US4824035A - Cage mill - Google Patents

Cage mill Download PDF

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Publication number
US4824035A
US4824035A US07/160,017 US16001788A US4824035A US 4824035 A US4824035 A US 4824035A US 16001788 A US16001788 A US 16001788A US 4824035 A US4824035 A US 4824035A
Authority
US
United States
Prior art keywords
ceramic
band
support shafts
cage mill
rings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/160,017
Other languages
English (en)
Inventor
Sousuke Naito
Hidekazu Takahashi
Shunzo Shimai
Toshio Watanabe
Yasuji Otsuka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KANSAI ZYARI 2-6-8 NISHI-TERNMAN KITA-KU OSAKA-SHI OSAKA-FU JAPAN KK
OTSUKA IRON WORKS Ltd 5-1-12 MITA MINATO-KU TOKYO JAPAN
Coorstek KK
KANSAI ZYARI KK
Original Assignee
KANSAI ZYARI KK
Otsuka Iron Works Ltd
Toshiba Ceramics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KANSAI ZYARI KK, Otsuka Iron Works Ltd, Toshiba Ceramics Co Ltd filed Critical KANSAI ZYARI KK
Assigned to OTSUKA IRON WORKS, LTD., 5-1-12, MITA, MINATO-KU, TOKYO, JAPAN, TOSHIBA CERAMICS CO., LTD., 1-26-2, NISHI-SHINJUKU, SHINJUKU-KU, TOKYO, JAPAN, KANSAI ZYARI KABUSHIKI-KAISHA, 2-6-8 NISHI-TERNMAN, KITA-KU, OSAKA-SHI, OSAKA-FU, JAPAN reassignment OTSUKA IRON WORKS, LTD., 5-1-12, MITA, MINATO-KU, TOKYO, JAPAN ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: OTSUKA, YASUJI, NAITO, SOUSUKE, WATANABE, TOSHIO, SHIMAI, SHUNZO, TAKAHASHI, HIDEKAZU
Application granted granted Critical
Publication of US4824035A publication Critical patent/US4824035A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/22—Disintegrating by mills having rotary beater elements ; Hammer mills with intermeshing pins ; Pin Disk Mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/20—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors
    • B02C13/205—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors arranged concentrically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements

Definitions

  • This invention relates to a cage mill which can crush hard materials such as stone.
  • a conventional cage mill has a plurality of cage type rotors each including a plurality of ceramic pins arranged in such a way that they rotate in opposite directions while the hard materials are supplied into a central space of the cage mill whereby the hard materials can be crushed.
  • a cage mill is disclosed in U.S. Pat. No. 4,580,736.
  • the ceramic pins are respectively supported by support shafts.
  • An adhesive is provided between each of the support shafts and the ceramic pins supported thereby so that the ceramic pins are fixed to the support shafts.
  • the object of this invention is to provide a cage mill in which a ceramic pin can be easily repaired at a low cost and operate for a long period of time.
  • a cage mill includes a housing, a disc rotatably supported within the housing, a plurality of support shafts each fixed at one end to the disc so as to form a cage, a band fixed to the other end of each of the support shafts, a plurality of ceramic pins each having a through-hole in which one of the support shafts is placed so as to support one of the ceramic pins, and means for releasably fixing the support shafts and the ceramic pins to the disc and the band.
  • the support shafts are loosely placed in the respective ceramic pins, so that the latter can be turned around the former when the fixing means is in a released condition.
  • the fixing means preferably includes: (a) a plurality of nuts, each engaging with a male screw portion of each end of the support shafts, for releasably fixing the ceramic pins to the band and the disc; (b) a spacer and a resilient member between one end of each of the support shafts and the disc, as well as a spacer and a resilient member between the other end of each of the support shafts and the band; and (c) a first base plate to which a plurality of ceramic linings are fixed, the first base plate being placed between the band and the resilient member and a second base plate to which a plurality of ceramic linings are fixed, the second base plate being placed between the disc and the resilient member.
  • FIG. 1 is a schematic perspective view showing a cage mill according to an embodiment of this invention
  • FIG. 2 is a schematic sectional view showing a mechanism in a housing of the cage mill shown in FIG. 1.
  • FIG. 3 is a sectional view showing ceramic linings and their related parts of the cage mill
  • FIG. 4 is a perspective view showing a ceramic lining for a band
  • FIG. 5 is a perspective view showing another ceramic lining.
  • FIG. 6 is a sectional view showing a band and its related member according to another embodiment of this invention.
  • plural ceramic pins 7 made of a ceramic material are arranged in a cage shape.
  • Each of the ceramic pins 7 has a through-hole 7a along its axis in which a support shaft 11 is loosely placed with a minor clearance.
  • the support shaft 11 has at both ends a male screw portion 11a.
  • a nut 13 is screwed with the male screw portion 11a at each end of the support shafts 11 so that the ends of the support shafts 11 are releasably fixed to a disc 3 and a ring-shaped band 9.
  • a base plate 54, a resilient member, such as a rubber ring 57, and a spacer 56 are disposed between the band 9 and one end of each of the ceramic pins 7 as well as between the disc 3 and the other end of each of the ceramic pins.
  • the nuts 13 are screwed with the male screw portions 11a, the disc 3 and the band 9 are forced to move close to the ends of the ceramic pins 7 against the resilience of the rubber ring 57 whereby the support shafts 11 and the ceramic pins 7 can be fixed to the band 9 and the disc 3 as a cage unit.
  • a plurality of ceramic linings 50 are closely fixed to the base plate 54 by means of an adhesive in a continuous mode so as to form a ring.
  • a hole 51 is formed in each of the ceramic linings 50 as shown in FIG. 4.
  • the rubber ring 57 and the spacer 56 are arranged in the hole 51.
  • a nut 58 is placed within the spacer 56 and engages with the male screw portion 11a of each of the support shafts 11 so as to function as a spacer.
  • a rubber ring 59 is disposed between the nut 58 and one end of the ceramic pin 7.
  • Ceramic linings 40, 60 cover the periphery of the disc 3 and the band 9 in a fixed condition.
  • Each of the ceramic linings 40, 60 has a portion which is complementary to portions of the disk and the band so as to be attached to or detached from the corresponding portions of the disc 3 and the band 9.
  • FIG. 1 shows a cage mill according to this invention.
  • the housing 2 is fixed through a frame 18 to a base 1.
  • two discs 3, 4 are concentrically arranged within the housing 2 in parallel to each other.
  • a central portion of the disc 3 is joined to one end of a driving shaft 5.
  • a central portion of the disc 4 is joined to another driving shaft 6.
  • the driving shafts 5, 6 are coaxially supported by bearings (not shown) and connected to respective motors (not shown), in such a way that they can rotate in opposite directions.
  • Ceramic pins 7 are releasably fixed to the disc 3 and the ring-shaped band 9 at regular intervals so as to form a large cage type rotor
  • plural ceramic pins 8 are releasably fixed to the disc 4 and the ring-shaped band 10 at regular intervals so as to form a small cage type rotor.
  • Each of the ceramic pins 7, 8 has a through-hole along its axis in which a support shaft 11 or 12 is loosely placed with a clearance.
  • the support shafts 11, 12 are fastened to the discs 3, 4 by means of nuts 13, 14, respectively.
  • the shafts 11, 12 are fastened to the bands 9, 10 by means of nuts 13, 14, respectively.
  • this invention can be applied to a cage mill having a single cage, four cages, or six cages.
  • the desired size of the final crushed product becomes smaller, the required number of cages increases.
  • a variety of product gradations can be easily altered by changing the speed of the cage mill.
  • the housing 2 is substantially cylindrical in shape although it is not limited only to such a shape.
  • the hard materials are inserted through an inlet of a hopper 15 into a central portion of the smallest cage near the driving shaft 6.
  • the hard materials are first crushed by the ceramic pins 8 and move outwardly. Such crushed materials are further crushed by the ceramic pins 7.
  • the materials move outwardly from the ceramic pins 7 so that they are crushed by braker plates 17 fixed on an inner surface of the housing 2 thereby to become the final crushed product. Thereafter the final crushed product falls by gravity through a lower exit 16 of the housing 2.
  • the large cage will be explained in detail as a typical example although this invention can be equally applied to both the small cage and the large cage.
  • Each support shaft 11 is loosely placed in the ceramic pin 7, for example, with a clearance of about 1 mm. No adhesive is provided in the clearance. Thus, the ceramic pin 7 can be turned about the support shaft 11 if the nuts 13, 58 are released.
  • a plurality of portions are closely or continuously formed on the inside of the disc 3.
  • a plurality of ceramic linings 30 each having a portion which is complementary to and fixed to the corresponding portions of the disc 3 so as to cover the inside of the disc 3.
  • the ceramic linings 30, each having a fan or trapezoidal shape, are close to each other so that substantially no clearance is formed between the ceramic linings 30.
  • One end of the support shaft 11 penetrates through a hole of each ceramic lining 30.
  • a plurality of ceramic linings 40 as shown in FIG. 5 are closely or continuously fixed to the periphery of the disc 3 to cover it.
  • Each of the ceramic linings 40 has a portion 40a which is set into a portion of the disc 3.
  • a plurality of ceramic linings 60, 90 similar to the ceramic linings 40 are closely or continuously fixed to the outer and inner peripheral portions of the band 9 to cover it.
  • each ceramic lining 50 has a fan or trapezoidal shape.
  • a hole 51 is formed in a central portion of the ceramic lining 50.
  • the support shaft 11 penetrates slightly through the hole 51.
  • a step portion 52 is formed along the hole 51.
  • One end of the support shaft 11 is inserted into the hole of the disc 3 and engages at its male screw portion 11a the nut 13 so as to releasably fix the ceramic pin 7 to the disc 3, whereas the other end of the support shaft 11 is inserted into the hole 9a of the band 9 and engages at its male screw portion 11a the nut 13 so as to releasably fix the ceramic pin 7 to the band 9.
  • the nut 9 is positioned in the hole 9a of the band 9.
  • the disc 4 is covered by a plurality of ceramic linings 31 similar to the ceramic linings 30 as in the disc 3.
  • the ceramic linings 31 of a fan or trapezoidal shape are closely or continuously arranged on the disc 4 in a complementary relation.
  • a plurality of ceramic linings 41 similar to the ceramic linings 40 are closely fixed to the outer periphery of the disc 4 in a complementary relation.
  • the band 10 is covered by a plurality of ceramic linings 51 similar to the ceramic linings 50 as in the band 9.
  • Many ceramic linings 61, 91 similar to the ceramic linings 40 are closely fixed to the inner and outer peripheral portions of the band 10 as in the band 9.
  • the ceramic linings each having a convex portion as shown in FIG. 5, can have good durability and excellent strength and be easily made and efficiently attached to or detached from the discs and the bands.
  • Adhesives for fixing the ceramic linings to the bands and the discs may be an epoxy resin or any other binder.
  • the ceramic linings are preferably made of alumina ceramics or silicon nitride.
  • a plurality of ceramic linings 50 shown in FIG. 4 are closely fixed in a ring shape to the band 9 through a ring-shaped metal base plate 54 by means of an adhesive.
  • Each of the ceramic linings 50 has the hole 51.
  • the male screw portion 11a of each support shaft 11 is inserted into the hole 51 of each ceramic lining and the hole 9a of the band 9.
  • the ceramic spacer 56 is set in the hole 51 of the ceramic lining 50 in such a manner that an outer surface of the ceramic spacer 56 partly contacts an inner surface of the hole 51.
  • One end of the spacer 56 contacts one end of the ceramic pin 7, whereas a resilient member, such as a rubber ring 57, is disposed between the other end of the ceramic pin 7 and the base plate 54.
  • the base plate 54, the rubber ring 57 and the spacer 56 are pressed by and between the ceramic pin 7 and the band 9 against the resilience of the rubber ring 57 so that they are fixed to each other.
  • a metal nut 58 engages with the male screw portion 11a of the support shaft 11 and functions as a spacer.
  • a rubber ring 59 is detachably disposed between one end of the ceramic pin 7 and the nut 58.
  • a cap 53 is detachably pressure-fitted in the hole 9a of the band 9.
  • FIG. 6 shows a modified ceramic lining 60 having a portion which is attached to a corresponding portion of a modified band 9.
  • the ceramic pin 7 can be turned in a desired direction around the support shaft 11 when the nuts 13 are released. For example, if a certain portion of the ceramic pin and in particular, a front portion thereof is remarkably worn down, after the nuts 13 are released, the ceramic pin 7 is turned until non-worn portion of the ceramic pin 7 moves to a front position where a majority of the hard materials are crushed by the ceramic pin 7. At that time, it is not necessary to disassemble the support shaft 11.
  • the ceramic pin 7 is gradually turned whenever a front portion of the ceramic pin 7 is worn down, the ceramic pin 7 can be repeatedly reused so that its effective life time becomes greater.
  • the resilient member such as the rubber ring 57 and the spacer 56
  • the fastening force of the nuts 13 can be adjusted in such a manner that the ceramic pins 7 can automatically turn around the support shaft 11, since if the resilience of the rubber ring 57 is weak while the cage mill operates.
  • the cage mill can operate at a high temperature because the heat expansion of the ceramic pin 7, the support shaft 11, the band 9, the disc 3 and other can be absorbed by the resilient member 57.
  • the base plate 54 receives all of the force for fixing the ceramic pin 7 and the centrifugal force occuring in rotation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Crushing And Grinding (AREA)
US07/160,017 1986-11-07 1988-02-24 Cage mill Expired - Fee Related US4824035A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61263851A JPS63119857A (ja) 1986-11-07 1986-11-07 ケ−ジミル

Publications (1)

Publication Number Publication Date
US4824035A true US4824035A (en) 1989-04-25

Family

ID=17395109

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/160,017 Expired - Fee Related US4824035A (en) 1986-11-07 1988-02-24 Cage mill

Country Status (5)

Country Link
US (1) US4824035A (enrdf_load_stackoverflow)
JP (1) JPS63119857A (enrdf_load_stackoverflow)
KR (1) KR930006041B1 (enrdf_load_stackoverflow)
AU (1) AU598054B2 (enrdf_load_stackoverflow)
FR (1) FR2606294B1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5845856A (en) * 1996-06-13 1998-12-08 Kansai Matec Co., Ltd. Pin mill type crusher

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100937337B1 (ko) * 2009-08-11 2010-01-15 (주)인터바이오 분쇄장치

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US211316A (en) * 1879-01-14 Improvement in disintegrating-mills
US2211570A (en) * 1938-06-02 1940-08-13 Morgan Concentrating Corp Disintegrating apparatus
US3503561A (en) * 1968-03-25 1970-03-31 Stedman Foundry & Machine Co I Disintegrator crushing member and support therefor
US4580736A (en) * 1983-12-29 1986-04-08 Toshiba Ceramics Co., Ltd. Cage mill

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US211316A (en) * 1879-01-14 Improvement in disintegrating-mills
US2211570A (en) * 1938-06-02 1940-08-13 Morgan Concentrating Corp Disintegrating apparatus
US3503561A (en) * 1968-03-25 1970-03-31 Stedman Foundry & Machine Co I Disintegrator crushing member and support therefor
US4580736A (en) * 1983-12-29 1986-04-08 Toshiba Ceramics Co., Ltd. Cage mill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5845856A (en) * 1996-06-13 1998-12-08 Kansai Matec Co., Ltd. Pin mill type crusher

Also Published As

Publication number Publication date
FR2606294B1 (fr) 1990-09-21
KR880005966A (ko) 1988-07-21
FR2606294A1 (fr) 1988-05-13
JPS63119857A (ja) 1988-05-24
JPH0432702B2 (enrdf_load_stackoverflow) 1992-06-01
AU8086787A (en) 1988-05-12
AU598054B2 (en) 1990-06-14
KR930006041B1 (ko) 1993-07-03

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AS Assignment

Owner name: KANSAI ZYARI KABUSHIKI-KAISHA, 2-6-8 NISHI-TERNMAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:NAITO, SOUSUKE;TAKAHASHI, HIDEKAZU;SHIMAI, SHUNZO;AND OTHERS;REEL/FRAME:004914/0435;SIGNING DATES FROM 19880516 TO 19880531

Owner name: OTSUKA IRON WORKS, LTD., 5-1-12, MITA, MINATO-KU,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:NAITO, SOUSUKE;TAKAHASHI, HIDEKAZU;SHIMAI, SHUNZO;AND OTHERS;REEL/FRAME:004914/0435;SIGNING DATES FROM 19880516 TO 19880531

Owner name: TOSHIBA CERAMICS CO., LTD., 1-26-2, NISHI-SHINJUKU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:NAITO, SOUSUKE;TAKAHASHI, HIDEKAZU;SHIMAI, SHUNZO;AND OTHERS;REEL/FRAME:004914/0435;SIGNING DATES FROM 19880516 TO 19880531

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